On Fri, 9 Dec 2016, Andreas Hollaus wrote:

> Are those callback functions triggered by the call to curl_multi_perform()?

Yes.
>
> If so, did I understand you correct that curl_multi_perform() won't return
> until all callback functions have been completed (they are running
> synchronously in the same thread as curl_multi_perform())?

Correct. libcurl doesn't start any new threads apart from doing name resolves
(if built like that).

-- 
  / daniel.haxx.se
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